if the 45-meter rocket hit the earth, it could wipe out entire city. earlier, we spoke to a representative from the institut for physics, and we asked if there could be any scientific connection whatsoever between today's brushes with the universe. >> no, there is no connection between these events. the two celestial bodies have a completely different orbit, so there cannot be a physical connection. >> do we know what happened in russia? >> it was probably a meter-sized meteorite impacting, and the sonic boom was heard. this kind of event happens maybe about once per year, but most of them go unnoticed. it is quite unusual to have this video coverage and more unusual to have very many injured. >> what about the asteroid? it is big enough for us to know about it. what is the likelihood something like that could hit the earth? >> objects of this size probably hit the earth about once every couple of hundred years. the last known impact was the event that happened in russia and siberia, flattening many square meters of forest and also two people were kill